diff --git a/packaging/scripts/postinstall.sh b/packaging/scripts/postinstall.sh
index 67c3d10ba..e484d920f 100644
--- a/packaging/scripts/postinstall.sh
+++ b/packaging/scripts/postinstall.sh
@@ -4,7 +4,7 @@ set -e
 USER_CHOICE_CONFIG="/etc/evcc-userchoices.sh"
 ETC_SERVICE="/etc/systemd/system/evcc.service"
 USR_LOCAL_BIN="/usr/local/bin/evcc"
-RESTART_FLAG_FILE=/var/lib/evcc/.restartOnUpgrade
+RESTART_FLAG_FILE="/tmp/.restartEvccOnUpgrade"
 
 # Usage: askUserKeepFile <file>
 # Return: 1 = keep, 0 = delete
@@ -12,7 +12,7 @@ askUserKeepFile() {
 	while true; do
 		echo "Shall '$1' be deleted? [Y/n]: "
 		read answer
-		case "$answer" in 
+		case "$answer" in
 			n*|N*)
 				echo "Ok. We will keep that file. Keep in mind that you may need to alter it if any changes are done upstream. Your answer is saved for the future."
 				return 1
@@ -45,7 +45,7 @@ if [ "$1" = "configure" ]; then
 		echo "This is probably due to a previous manual installation."
 		echo "You probably want to delete this file now. Your evcc configuration stays untouched!"
 		askUserKeepFile "$ETC_SERVICE" || KEEP_ETC_SERVICE=$?
-	fi	
+	fi
 	if [ -f "$USR_LOCAL_BIN" ] && [ "$KEEP_USR_LOCAL_BIN" -eq 0 ]; then
 		echo "An alternate evcc binary was detected under '$USR_LOCAL_BIN'."
 		echo "This is probably due to a previous manual installation."
@@ -53,7 +53,7 @@ if [ "$1" = "configure" ]; then
 		askUserKeepFile "$USR_LOCAL_BIN" || KEEP_USR_LOCAL_BIN=$?
 	fi
 	# Save the user decision
-	cat > "$USER_CHOICE_CONFIG" <<EOF 
+	cat > "$USER_CHOICE_CONFIG" <<EOF
 #!/bin/sh
 KEEP_ETC_SERVICE=$KEEP_ETC_SERVICE
 KEEP_USR_LOCAL_BIN=$KEEP_USR_LOCAL_BIN
diff --git a/packaging/scripts/preinstall.sh b/packaging/scripts/preinstall.sh
index 1da63b771..30aab2317 100644
--- a/packaging/scripts/preinstall.sh
+++ b/packaging/scripts/preinstall.sh
@@ -10,7 +10,7 @@ set -e
 EVCC_USER=evcc
 EVCC_GROUP=evcc
 EVCC_HOME="/var/lib/$EVCC_USER"
-RESTART_FLAG_FILE=$EVCC_HOME/.restartOnUpgrade
+RESTART_FLAG_FILE="/tmp/.restartEvccOnUpgrade"
 
 copyDbToUserDir() {
   CURRENT_USER=$(systemctl show -pUser evcc | cut -d= -f2)